update readme

Author: StardustDL

README.md

@@ -2,11 +2,12 @@
 
 ![CI](https://github.com/StardustDL/ImagingS/workflows/CI/badge.svg)
 
-![](https://repository-images.githubusercontent.com/226446069/543f5900-b6f2-11ea-8f2a-47095902e2bd)
+![](https://repository-images.githubusercontent.com/226446069/77831900-b856-11ea-95ef-6fd6c38a9edc)
 
 A toolset for computer graphics and imaging processing.
 
-[Demo Video](https://www.bilibili.com/video/BV1Q54y1i7Lg/)
+- [Demo Video](https://www.bilibili.com/video/BV1Q54y1i7Lg/)
+- [Usage 中文](https://github.com/StardustDL/own-staticfile-hosting/tree/0eb7357813c8f043e5bc6c488e4fe2c971a87424/StardustDL/ImagingS/Helping)
 
 ## Features
 
@@ -33,6 +34,33 @@ A toolset for computer graphics and imaging processing.
 - Export
   - PNG, JPEG, BMP
 
+## Usage
+
+1. Clone this repository.
+2. Install dependencies.
+
+```sh
+pip install requirements.txt
+```
+
+3. Generate UI codes
+
+```sh
+python -m ImagingS.Gui.uic
+```
+
+4. Run GUI
+
+```sh
+python -m ImagingS.Gui
+```
+
+5. Run CLI
+
+```sh
+python -m ImagingS.Cli input.txt output_dir
+```
+
 # License
 
 All rights reserved.